20311099200 has 252 divisors, whose sum is σ = 82503772000. Its totient is φ = 4642513920.

The previous prime is 20311099189. The next prime is 20311099217. The reversal of 20311099200 is 299011302.

It is a tau number, because it is divible by the number of its divisors (252).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51 + ... + 201549.

Almost surely, 2^20311099200 is an apocalyptic number.

20311099200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311099200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41251886000).

20311099200 is an abundant number, since it is smaller than the sum of its proper divisors (62192672800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311099200 is a wasteful number, since it uses less digits than its factorization.

20311099200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201534 (or 201516 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The spelling of 20311099200 in words is "twenty billion, three hundred eleven million, ninety-nine thousand, two hundred".